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Telegram/ThirdParty/range-v3/include/range/v3/action/split_when.hpp

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+/// \file
+// Range v3 library
+//
+//  Copyright Eric Niebler 2013-present
+//
+//  Use, modification and distribution is subject to the
+//  Boost Software License, Version 1.0. (See accompanying
+//  file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//
+// Project home: https://github.com/ericniebler/range-v3
+//
+
+#ifndef RANGES_V3_ACTION_SPLIT_WHEN_HPP
+#define RANGES_V3_ACTION_SPLIT_WHEN_HPP
+
+#include <vector>
+
+#include <meta/meta.hpp>
+
+#include <range/v3/range_fwd.hpp>
+
+#include <range/v3/action/action.hpp>
+#include <range/v3/action/concepts.hpp>
+#include <range/v3/functional/bind_back.hpp>
+#include <range/v3/functional/invoke.hpp>
+#include <range/v3/iterator/concepts.hpp>
+#include <range/v3/iterator/traits.hpp>
+#include <range/v3/range/conversion.hpp>
+#include <range/v3/utility/static_const.hpp>
+#include <range/v3/view/split_when.hpp>
+
+#include <range/v3/detail/prologue.hpp>
+
+namespace ranges
+{
+    /// \addtogroup group-actions
+    /// @{
+    namespace actions
+    {
+        struct split_when_fn
+        {
+            template<typename Rng>
+            using split_value_t =
+                meta::if_c<(bool)ranges::container<Rng>, //
+                           uncvref_t<Rng>, std::vector<range_value_t<Rng>>>;
+
+            template<typename Fun>
+            constexpr auto operator()(Fun fun) const
+            {
+                return make_action_closure(
+                    bind_back(split_when_fn{}, static_cast<Fun &&>(fun)));
+            }
+
+            // BUGBUG something is not right with the actions. It should be possible
+            // to move a container into a split and have elements moved into the result.
+            template(typename Rng, typename Fun)(
+                requires forward_range<Rng> AND
+                        invocable<Fun &, iterator_t<Rng>, sentinel_t<Rng>> AND
+                            invocable<Fun &, iterator_t<Rng>, iterator_t<Rng>> AND
+                                copy_constructible<Fun> AND
+                                    convertible_to<invoke_result_t<Fun &, iterator_t<Rng>,
+                                                                   sentinel_t<Rng>>,
+                                                   std::pair<bool, iterator_t<Rng>>>)
+            std::vector<split_value_t<Rng>> operator()(Rng && rng, Fun fun) const
+            {
+                return views::split_when(rng, std::move(fun)) |
+                       to<std::vector<split_value_t<Rng>>>();
+            }
+
+            template(typename Rng, typename Fun)(
+                requires forward_range<Rng> AND
+                        predicate<Fun const &, range_reference_t<Rng>> AND
+                            copy_constructible<Fun>)
+            std::vector<split_value_t<Rng>> operator()(Rng && rng, Fun fun) const
+            {
+                return views::split_when(rng, std::move(fun)) |
+                       to<std::vector<split_value_t<Rng>>>();
+            }
+        };
+
+        /// \relates actions::split_when_fn
+        RANGES_INLINE_VARIABLE(split_when_fn, split_when)
+    } // namespace actions
+    /// @}
+} // namespace ranges
+
+#include <range/v3/detail/epilogue.hpp>
+
+#endif